Abner w



ABNER W. NEWHAIJL, OF HORSE HEADS, NEW YORK.

.Lenen Familie. vassadated Marel e1, 186s.

IMPROVEMENT IN MACHINE FOR SARPBNING lAND GUMMING' SAWS.

j dlgs Stigthitle rfcrret tu in these ltttets 'mimi :mt milking satt nf the same.

'IIO LL WHOM IT MAY CONGERN: y

Be it known that I, ABNER W. NEWHALL, of' Horse Heads, in the county of Chemung, andState of New Yorlg have invented a new Aand useful Machine for Sharpening and Gumming Saws; and I do Ahereby declarev that the following is a full, clear, and exact description ofthe same, reference being had to the annexed drawings, in which the machine is sho\vn.in perspective.

My inlprovementconsists in-combiningwith an emery-wheel a table' for supporting vthe saw, which is com.

structed'wit-h two folding leaves, so adjustable as to be maintained at the same angle below the horizontal pla-ne of 'the table. j

In the znnexed drawings, A is an ein'ery-wheel, such as is in'common use for grinding and gumming saws. It is hung on'al mandrel, B, supported on a suitable frame, and driven by the pulley C. The saw in sharpening or gumming, is supported'upon one of the folding leaves D D of the table. These leaves are semicircular, and hinged, as shown, to 'the top' of the central post D.' The leaves rest respectively upon the points of the` bifurcated support E, which is attachedto the post D by-a set-screw, E', passing through a slot, o1' in other convenient manner. AThe table is attached lto an adjustable arm, F, fastened by a set-screw passing through a slot to the saw-frame, i-n such manner that the table may be adjusted as may become necessary in relation to the saw. Byraising or lowering the bifurcated support E, the leaves D D may be set at a greater o1' less angle to the horizont-al plane of. the table, and as the Isupport will maintain thern at the same angle, the;sa\v being transferred from one to the other lin grinding, it follows that the sides of the teeth will be cut at the same angle.

I am aware that` an'oscillating table has been` used for this pui-pose. It, however, requires considerable vcare in adjusting it when reversed, in order to secure equal angles, and is correspondingly liable to Vproduce inequalities in the angles, while by having two leaves on opposite sides, always maintained lat equa-l angles, tnegrinding must be accurate.

Ido not claim the table adjustable at an angle as my invention but What I do claim as my invention, and desire to secure byIietters-Patent, is A table for supporting saws in being ground and gummed, constructed with two folding leaves D D soA adjustably supported by the bifurcated support E-,as to maintain equal anglesv to the horizontal plane, substan y tially as and for the purposeset forth.

In testimony whereof, I have signed my naine t'o'this specification in the presence of two subscribing witnesses.

' A. NEWIIALL Witnesses:

JonN D. BLooa, JOHNYS. H oLLINGsnnAn. 

